21223401234 has 16 divisors (see below), whose sum is σ = 48510631488. Its totient is φ = 6063828912.

The previous prime is 21223401203. The next prime is 21223401293. The reversal of 21223401234 is 43210432212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252659497 + ... + 252659580.

It is an arithmetic number, because the mean of its divisors is an integer number (3031914468).

Almost surely, 2^21223401234 is an apocalyptic number.

21223401234 is an abundant number, since it is smaller than the sum of its proper divisors (27287230254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21223401234 is a wasteful number, since it uses less digits than its factorization.

21223401234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505319089.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21223401234 its reverse (43210432212), we get a palindrome (64433833446).

The spelling of 21223401234 in words is "twenty-one billion, two hundred twenty-three million, four hundred one thousand, two hundred thirty-four".